The cigarette lighter was invented before the match.
210
In the early 1960's, Porsche commercially manufactured farm tractors.
24
Students at MIT developed a wristband that can regulate your “thermal comfort”, which could possibly eliminate the need for central heating and cooling.
17
An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
Technically speaking, crystal glass is actually a Liquid that flows very slowly.
43
Any modern jet is capable of breaking the sound barrier.
34
A small airplane can fly backwards.
75

